Milking-machine.



L. BURRELL.

MILKING MACHINE.

APPLICATION FILED IBB.7, 1907.

942,482. Patented Dec. 7, 1909.

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hurrah s rangers oiaasrcn LOOMIS BURBELL, OF LITTLE FALLS, NEW YORK,ASSIGNOR T0 1). H. BUEBELL COMPANY, 01 LITTLE FALLS, NEW YORK.

' MILKING-MACHINE.

Application filed February a, 1907. serial in. 356,137. v

This invention relates to that class of milking machines in which anintermittent or pulsating suction is applied to the teat In milkingmachines ofthis character cups. the pulsator is usually portable andcomprises a pulsator valve or piston which alternately applies thesuction to the teat cups and disconnects the suction therefrom and asmall valve for automatically reversing the movement of the pulsatorvalve or piston. This reversing valve is usually actuated automaticallyfrom the pulsator valve or piston by means of intervening mechanism.

The object of this invention is to actuate the reversing valve andthrough it the pulsator by electric means, so that the movement of thereversing valve is effected by means independent of the pulsator valveor piston, thereby avoiding intervening mechanism for connecting thepulsator valve or piston with the reversing valve.

In the accompanying drawings: Figure 1 is an elevation of a milkingmachine embodying this invention. Fig. 2 is an elevation of the circuitbreaker,- on an enlarged scale. Fig. 3 is a top plan, on an enlargedscale, of one of the milk vessels and the pulsator and electricacttiating mechanism mounted thereon. Fig. l'is an elevation of thecircuit-breaker wheel and spring. Fig. 5 is a sectional elevation of thepulsator and connecting parts, in line 5 5, I ig.3. Figs.

6 and 7 are vertical sections of the reversing.

valve in line 66, Fig. 3, on an enlarged scale, showing the valve indifferent positions. Fig. 8 is an elevation of the suction pump providedwith .a circuit breaking wheel.

Like letters and numerals of reference refer to like parts in theseveral figures.

A represents the suction pump, B the equalizing-tank, C the main suctionpipe extending from the pump through the stable, and D one of theportable milk vessels-of which any suitable number can be used and whichare connected with the suction pipe by branch pipes 20 applied tonipples 21 on the main suction pipe. All of these parts may be of anysuitable or well known construction.

E represents the. pulsator which is mounted on the milk vessel D andconstructed to be operated by pneumatic means, preferably by the suctionapplied to the vessel.- This pulsator may be constructed and arranged inany suitable manner, the par-- ticular construction and arrangementshown serving only to illustrate a desirable type of pulsator and aconvenient way of mounting the same i i F represents the reversing valvewhich is connected with the pulsator for, reversin the movement of thepiston or'valve thereot.

In the type of pulsator shown in the draw- Patented has. a. tees.

air to the same, whereby the pulsator piston is caused to move back andforth.

The construction of the pulsator and reversing valve shown in thedrawings isas follows: 22 represents the upright pulsator casing securedupon thecover 23 of the milk vessel and having itsopen lower end openinginto the milk vessel. 24 are the nipples in the side of the casing. 25one ofthe milk pipes connecting therewith, 26 one of the couplings, and27. a set of teat cups. 28 represents the pulsator piston or valvearranged with its small lower portion in the lower portion of the casingand with its large upper portion in the upper portion of the casin 29represents the shoulder at the junction of the two portions of thecasing which limits the movement of the pulsator valve or piston towardthe open end air inlets in the casing, one above and the other belowthis shoulder to admit air to the teat cups for relieving the' vacuumwhen the suction is cut oil therefrom and to insure the admission of theexternal air to the under side of the large upper portion of the pistonin all positions of the latter. 32 represents the pipe which connectsthe upper head 33 of the pulsator casing with the port 34 of the casing35 of the reversing valve F. The latter is a reciprocating piston valvewhich is arranged horizontally in the bore of the pulsator casing. 30and 31 are the of the casing and comprises two pistons'36,

- 37, and anintermediate reduced connection piece 38.

casing and admits the external air to the pipe and above the piston ofthe pulsator.

When the large end of the pulsator piston 28 is exposed to the suctionthe piston moves a a contact spring 45.

upwardly and when the suction is disconnected from thelarge end of thepistonand the large end is exposed to the atmosphere the piston movesdownwardly.

The reversing valve F is actuated by an electro-magnetic mechanism whichis intermittently energized and which may be of any suitableconstruction. That shown in the drawings comprises two electro -magnetsG whichare mounted side by side upon a bed plate 40 which is secured tothe cover of the milk vessel,and an armature -H which is attached at oneend to the reversing valve and pivoted at the opposite end 41 to the bedplate 40. I

42 represents a retracting spring which draws the armature away from themagnets, the return movement of the armature being limited by anysuitable means, for instance, by a stop 43. When the magnets areenergized the tension of the spring is overcome and the armature isattracted, thereby moving the reversing valve in one direction, and whenthe magnets are deenergized the spring moves the armature away from themagnets, thereby moving the valve in the opposite direction. The currentfor energizing the electro-magnets intermittently may be produced in anysuitable manner, for instance, by a circuit breaker I of well knownconstruction comprising a toothed wheel 44 and a This wheel may beactuated by a clock mechanism K, Fig. 2, having a pendulum 46, theweight of which is adjustable to regulate the frequency of thepulsations which range usually from to per minute. If desired, the wheelmay be driven from the shaft of the suction pump A, as represented inFig. 8.

L represents the battery or generator which supplies the current; Mrepresents the main conductors-connected therewith, and N represents thebranch conductors which are detachably connected with the outlets of themain conductors by contact plugs O of any suitable construction; themain conductors, which extend through the stable, being provided withoutlets or sockets I at suitable points.

The reversing valve 'F is comparatively small and the'power which isrequired for moving the same is correspondingly small and can be readilysupplied by a small electro-magnet. The electro-magnetic mechanism foractuating the reversing valve is therefore comparatively light and canbe easily carried about, together with the pulsator, whether'mountedupon the milk vessel, as shown, or otherwise supported. The pulsatorvalve or piston is much larger than the reversing valve and requiresgreater power for moving the same, which power is supplied by pneumaticmeans.

I claim as m invention:

1. In a milklng machine, the combination of teat cups. a suctionapparatus, apulsator which applies the suction intermittently to theteat cups and which is moved by pneumatic 'means, and an electricmechanism which operates the pulsator, substantially as set forth.' v

i2. Ina milking machine, the combination of teat cups, a suctionapparatus, a pulsator which applies the suction intermittently to theteat cups, a reversing valve for the pulsator, andan electric mechanismwhich actuates the reversing valve, substantially as set forth. 1

3. In a milking machine, the combination of ,teat cups, a suctionapparatus. a pulsator having a reciprocating valve which applies thesuction intermittently to the teat cups and which is acted upon by thesuction, a reversing valve whichalternately applies the suction to thepulsator valve and disconnects the suction therefrom, and an electricmechanism which actuates the reversing valve, substantially as setforth.

4. In a milking machine, the combination of teat cups, a suctionapparatus, a pulsator which applies the suction intermittently to theteat cups, an electro-magnetic mechanism for operating the, pulsator,:rgenerator, and a circuit-breaker for supplying current intermittently tothe electro-magnetic mechan ism, substantially as set forth., a

5. In a milking machine, the combination of teat cups, a suctionapparatus, a pulsator which applies the suction intermittently to theteat cups, a reversing valve for the pulsator, an electro-magnet foractuating the reversing valve, a generator, and a circuitbreaker forsupplying current intermittently to the electro-magnet, substantially asset forth.

6.- In a milking machine, the combination of teat cups, a suctionapparatus. a portable pulsator which applies the suction intermittentlyto the teat cups, and a portable electric mechanism for operating thepulsator, substantially as set forth.

7. In a-milking machine, the combination of teat'cups, a suctionapparatus, a portable pulsator which applies the suction inter-"pulsator which produces pulsations in the teat cups and which ismovable independently of the primary pulsator, and means fortransmitting to the seconda pulsator the pulsations produced bythe PII-.mary pulsator.

9. The combination of teat on s, a primary pulsator which produces pusations of a power transmitting medium, a secondary pulsator whichresponds to said pulsations and produces pulsations in the teat cups,and means for actuating the primary pulsator independently of thesecondary pulsator. p a I 10. In a milking machine a pulsator, an

-'electro-magnet for controlling the same, a

source of electrical energy to which the electro-magnet is connected,and means for causing the electro-magnet and pulsator to actintermittently. 7

11. In a milkin apparatus, a pulsator, electro-magnetical y operatedmeans controlling the action of the pulsator, an electric circuitincludin a source of energy, and means for alternate y making andbreaking the circuit. 7

12. A-milking apparatus including a milk receptacle, a vacuum tankconnected to the milk receptacle and adapted to maintain a practicallyconstant de ree of vacuumtherein, teat cups, milk tu es leadingtherefrom, and an electro-magnetically operated pulsator controllingcommunication between the milk tubes and the receptacle;

13. In a milkin .machine, the combination of a vacuum mi k receptacle,an' air-tight cover therefor, a pulsator mounted on said cover andhavingvacuum, milk and air connections, and an electro-magnet mounted on saidcover and operatively connected with said pulsator.

14. In a milking apparatus, a vacuum milk receptacle, an air and milkpassage for said receptacle, an electro-magnetically I operated pulsatorfor controlling said air andmilk passage, an'electric generator,electric connections between said electric generator and said pulsator,and a circuit interrupter included in said connections for making andbreaking the circuit to said pulsator.

15. In a milkin machine, the combination,

of a portable pu sator adapted. to produce suction impulses in the pipebetween the milk receptacle and the cow, and a portable electricmechanism for operating the pulsator.

16. In a milking machine provided with teat-cups, and vacuum producingapparatus, a pulsator to control the period of maximum vacuum upon thecups, electrical means to operatethe pulsator valve, a circuit chang ingdevice in the electric circuit, and a variable speed motor to operatesaid changing device and regulate the frequency of action of theelectrical means upon the pulsator valve.

WVitness my hand this 31st day of January, 1907.

LOOMIS BURRELL. Witnesses:

CHAS. B. DALZELL,

CHAS. S'rmcmz.

